Litt 2009.

Methods	RCT; 2 arms; CBT + standard treatment; standard treatment; post‐treatment
Participants	End of treatment: n = 54 Start of treatment: n = 54 Sex: 46 F; 8 M Mean age: 41.0 (SD 11.0) Source = dental clinics and dentists (15%); newspaper and web adverts (85%) Diagnosis = temporomandibular disorder Mean years of pain: 5.6 (SD 5.4)
Interventions	CBT + standard treatment; standard treatment (splint, diet, NSAIDs)
Outcomes	Primary pain outcome: MPI 0 to 6 Primary disability outcome: interference MPI 0 to 6 Primary mood outcome: CES‐D Catastrophising outcome: data not available Pain Intensity MPI 0 to 6 CES‐D Depression Interference with activity MPI 0 to 6 2 items modified from Catastrophising Sub‐Scale CSQ Several times daily sampling of pain, control, affect, coping, catastrophising
Notes	CBT versus TAU: analyses 3.1, 3.2, 3.3 2011 update search Yates quality scale: total quality 14/35, design quality 11/26, treatment quality 3/9
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computerised urn randomisation
Allocation concealment (selection bias)	High risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	High risk	Attrition not reported
Selective reporting (reporting bias)	Low risk	Fully reported
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not reported